View colors problem

Hello,

I fail to change the colors on a view that I have embedded on another website.
I have tried all the commands at
https://help.creator.zoho.com/Style-based-URLs-for-Embedded-Forms.html#6._View_Customization
but they have no effect (although commands for other things that color work).

Could anyone please tell me how I can change the colors?
Would appreciate any help.

Thanks